#include<stdio.h>
#include"math.h"
int main()
{
    int n,a,i;
    printf("The series with equal difference are:\n");
    for (n=1;n<=6;n++)
    for(a=1;a<=4;a++)
    if(4*n+6*a==26&&n*(n+a)*(n+a+a)*(n+a+a+a)==880)
    for(i=0;i<20;i++)
    printf("%d",n+i*a);


}
